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  • 1990-1994  (29)
  • 1970-1974
  • 1945-1949
  • 1930-1934
  • 1994  (14)
  • 1990  (15)
  • 1
    Digitale Medien
    Digitale Medien
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 1436-1438 
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: We describe a plasma-based dry etching procedure which permits selective etching of Si over Ge with a Si/Ge etch rate ratio of over 70 and negligible etching of the Ge underlayer. This is achieved in a SF6/H2/CF4 gas mixture by the formation of a thin ((approximately-equal-to)3 nm) involatile etch stop layer on the Ge surface which consists of Ge-sulfide and carbonaceous material.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1520-4804
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 8 (1994), S. 0 
    ISSN: 1747-6593
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Energietechnik
    Notizen: The use of cement kilns for managing solid and hazardous wastes is facilitated by the high temperature, long gas retention periods, natural alkaline environment, minimum amount of waste produced and high thermal capacity. The main benefits include energy recovery, conservation of fossil fuels, reduction in cement production costs and the use of already existing facilities.The test burns conducted in cement kilns worldwide have demonstrated very high destruction efficiencies for most stable organic compounds, with toxic contaminants barely above the background levels.There are several cement plants in the US and Europe presently using solid and hazardous wastes as supplementary fuel. The application of this technology in Australia has been ignored in the past. An international conference (Kilnburn‘92) on the role of cement kilns in waste management was held recently in Australia and has enhanced the implementation of this technology in Australia.
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Clinical & experimental allergy 20 (1990), S. 0 
    ISSN: 1365-2222
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 611 (1990), S. 0 
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 21 (1994), S. 0 
    ISSN: 1365-2842
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: This study investigated the temperature of healthy oral mucosa and underlying bone. Using a fine thermocouple and digital thermometer, four groups of temperatures were measured: (i) adjacent to uncrupted third molars before and after surgical removal (n= 51); (ii) at the same site in patients not undergoing surgery (n= 30); and (iii) at the buccal incisor mucosa (n= 30). In each group sublingual temperatures were measured in order to calculate the temperature differential between measurement site and sublingual temperature to compensate for variations between sites and individuals. In the final group (iv) (n= 10) sublingual temperature was recorded in a closed mouth.Mean alveolar bone temperature was 5°C cooler than overlying mucosa, and mean post-operative mucosal temperature was some 2.5°C cooler than before operation (t= 2.32, P 〈 0.001). Sublingual temperature, in a closed mouth, remained relatively constant. In an open mouth, in both anterior and posterior regions, there were statistically significant decreases in sublingual temperature and in mucosal temperature differentials. Significant differences were also found between temperature differentials calculated using sublingual temperature measured at baseline and after 10 min. This indicates that sublingual temperature should be measured just prior to measuring a mucosal site.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 4 (1990), S. 0 
    ISSN: 1365-2036
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Seventy-two patients with H. pylori infection in their antral mucosa took part in the study. Forty-three received metronidazole 400 mg t.d.s. for two weeks, plus De-Nol tabs 2 b.d. for four weeks, and the remaining 29 patients received metronidazole 400 mg t.d.s. for two weeks plus De-Nol liquid 5 ml q.d.s. for four weeks. Seven of 57 H. pylori isolates were found to have pre-treatment metronidazole resistance. Success, in terms of eradication of H. pylori, was assessed using a one-month post-treatment 14C urea breath test.Successful eradication of H. pylori was achieved in 72% and 79%, respectively, of the metronidazole/De-Nol tablet and metronidazole/De-Nol liquid groups. These figures increased to 87% and 84%, respectively, if the patients whose organisms were known to be metronidazole-sensitive were considered in isolation. H. pylori was successfully eradicated in only one of seven patients with a metronidazole-resistant organism.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 46 (1990), S. 78-81 
    ISSN: 1600-5759
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Chemie und Pharmazie , Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    World journal of urology 12 (1994), S. 89-95 
    ISSN: 1433-8726
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Recent investigations have given a clearer insight into the genetic progression of bladder cancer. In this review we identify the clinical courses of bladder cancer, review the basic concepts of carcinogenesis, and focus on the specific cytogenetic and molecular alterations observed in bladder cancer. Progression models to superficial and invasive disease are discussed.
    Materialart: Digitale Medien
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  • 10
    ISSN: 1572-9842
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Klassische Archäologie
    Beschreibung / Inhaltsverzeichnis: Résumé Dans toute la préhistoire de l'Afrique occidentale, aucune période ne reste peut-être plus mystérieuse que celle située entre la fin du Pléistocène et le milieu de l'Holocène. Diverses industries macrolithiques et microlithiques se partagent cette période. Le phénomène macrolithique reste mal défini, la plupart des exemples en sont généralement rassemblés en un seul groupe, ou attribués à des périodes antérieures. Des recherches archéologiques effectuées dans les régions de la vallée du Serpent et du sud du Gourma au Mali ont révélé des collections macrolithiques de l'Holocène bien différentes des traditions bifaciales bien connues de Cap Manuel et Manianbougou, mais non sans parallèles ailleurs dans le Sahel et la Savanne. Le plus important des sites de la vallée du Serpent est celui de SirakoroAncien où des agrégats de pierres travaillées sont associés à plusieurs cercles de galets en latérite que l'on pense être des restes de structures. Cette industrie lithique consiste en éclats massifs, peut-être retirés directement de couches géologiques locales, et en éclats plus petits provenant de nucleus préparés ainsi que des outils. Des preuves géomorphologiques et archéologiques suggèrent que les sites de la vallée du Serpent ont entre 9000 et 6000 ans. Une nouvelle synthèse, fondée sur les sites étudiés par les auteurs et des documents principalement en français, est présentée afin d'éclairer cette partie négligée de la préhistoire africaine.
    Notizen: Abstract Within West African prehistory, perhaps no period remains more mysterious than that between the Terminal Pleistocene and the mid-Holocene. This time period is shared by diverse macrolithic and microlithic industries. The macrolithic phenomenon has remained ill-defined, with most occurrences being generally lumped together as a single group, or attributed to earlier time periods. Recent archaeological investigations in the Vallée du Serpent and southern Gourma regions of Mali have revealed Holocene macrolithic assemblages quite different from the well-known bifacial traditions of Cap Manuel and Manianbougou, but not without parallels from elsewhere in the Sahel and Savanna. The most important of the Vallée du Serpent sites is that of Sirakoro-Ancien, where worked stone aggregations are associated with several rings of laterite cobbles believed to be the remnants of structures. Its lithic industry consists of massive flakes, perhaps removed directly from local outcrops, and smaller flakes from prepared cores as well as formal tools. Geomorphological and archaeological evidence suggests an age of the Vallée du Serpent sites somewhere between 9000 and 6000 bp. A new synthesis based upon sites investigated by the authors and the predominantly Francophone literature is presented in order to shed light upon this neglected portion of African prehistory.
    Materialart: Digitale Medien
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